Question
What are the missing numbers?
1428, (a) _____ , 1528, 1578, 1628, (b) _____
1 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

What are the missing numbers?
1428, (a) _____ , 1528, 1578, 1628, (b) _____